ATE5446T1 - Herstellverfahren fuer magnetische teilchen mit erhoehter koerzitivkraft aus mit kobalt dotiertem ferrimagnetischem eisenoxid. - Google Patents

Herstellverfahren fuer magnetische teilchen mit erhoehter koerzitivkraft aus mit kobalt dotiertem ferrimagnetischem eisenoxid.

Info

Publication number
ATE5446T1
ATE5446T1 AT81400603T AT81400603T ATE5446T1 AT E5446 T1 ATE5446 T1 AT E5446T1 AT 81400603 T AT81400603 T AT 81400603T AT 81400603 T AT81400603 T AT 81400603T AT E5446 T1 ATE5446 T1 AT E5446T1
Authority
AT
Austria
Prior art keywords
iron oxide
cobalt
doped
production process
magnetic particles
Prior art date
Application number
AT81400603T
Other languages
German (de)
English (en)
Inventor
Alex Chamard
Patrick Dougier
Jean-Bruno Monteil
Original Assignee
Rhone-Poulenc Industries
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rhone-Poulenc Industries filed Critical Rhone-Poulenc Industries
Application granted granted Critical
Publication of ATE5446T1 publication Critical patent/ATE5446T1/de

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances

Landscapes

  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
  • Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)
AT81400603T 1980-04-28 1981-04-15 Herstellverfahren fuer magnetische teilchen mit erhoehter koerzitivkraft aus mit kobalt dotiertem ferrimagnetischem eisenoxid. ATE5446T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8009498A FR2481256A1 (fr) 1980-04-28 1980-04-28 Particules magnetiques de coercivite elevee a base d'oxydes de fer ferrimagnetique dopees au cobalt, leurs procedes de preparation et leurs applications
EP81400603A EP0039273B1 (fr) 1980-04-28 1981-04-15 Procédé de préparation de particules magnétiques de coercivité élevée à base d'oxydes de fer ferrimagnétique dopées au cobalt

Publications (1)

Publication Number Publication Date
ATE5446T1 true ATE5446T1 (de) 1983-12-15

Family

ID=9241412

Family Applications (1)

Application Number Title Priority Date Filing Date
AT81400603T ATE5446T1 (de) 1980-04-28 1981-04-15 Herstellverfahren fuer magnetische teilchen mit erhoehter koerzitivkraft aus mit kobalt dotiertem ferrimagnetischem eisenoxid.

Country Status (6)

Country Link
US (1) US4371567A (ja)
EP (1) EP0039273B1 (ja)
JP (1) JPS5915483B2 (ja)
AT (1) ATE5446T1 (ja)
DE (1) DE3161480D1 (ja)
FR (1) FR2481256A1 (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6025026A (ja) * 1983-07-20 1985-02-07 Nec Corp 磁気デイスク媒体
JPS60184576A (ja) * 1984-03-01 1985-09-20 Daikin Ind Ltd 磁性塗料組成物
US5202043A (en) * 1985-01-09 1993-04-13 Bayer Aktiengesellschaft Process for the preparation of isometric magnetic iron oxide
DE3631193A1 (de) * 1986-09-13 1988-03-24 Bayer Ag Magnetische eisenoxidpigmente und verfahren zu ihrer herstellung
DE3631194A1 (de) * 1986-09-13 1988-03-24 Bayer Ag Magnetische eisenoxidpigmente sowie verfahren zu ihrer herstellung
JPS63305976A (ja) * 1987-06-05 1988-12-13 有限会社　和金工業 木の葉洗浄装置
FR2714205A1 (fr) * 1993-12-17 1995-06-23 Atg Sa Matériau composite pour l'enregistrement magnéto-optique, sa préparation et son utilisation.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2074706A7 (en) * 1970-01-20 1971-10-08 Geopetrole Removal of iron contamination - and prepn of magnetic oxides via iron glycerol complex
JPS5321119B2 (ja) * 1973-03-20 1978-06-30
DE2242500A1 (de) * 1972-08-30 1974-03-07 Basf Ag Verfahren zur herstellung von nadelfoermigen metall- und kohlenstoffhaltigen eisenoxiden
JPS6044254B2 (ja) * 1977-03-16 1985-10-02 富士写真フイルム株式会社 強磁性粉末の製造方法
NL7902902A (nl) * 1978-04-17 1979-10-19 Montedison Spa Werkwijze ter bereiding van magnetische poeders op basis van gamma-fe203, de aldus verkregen poeders en magnetische banden, die deze poeders bevatten.
DE2905351A1 (de) * 1979-02-13 1980-08-21 Basf Ag Verfahren zur herstellung von nadelfoermigem kobalthaltigem, magnetischem eisenoxid

Also Published As

Publication number Publication date
JPS56167301A (en) 1981-12-23
EP0039273A1 (fr) 1981-11-04
DE3161480D1 (en) 1983-12-29
FR2481256B1 (ja) 1984-09-21
EP0039273B1 (fr) 1983-11-23
US4371567A (en) 1983-02-01
JPS5915483B2 (ja) 1984-04-10
FR2481256A1 (fr) 1981-10-30

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee